>>We see this all the time when people are trying to outsmart Nature. They are called pharmaceuticals and look at how dangerous they are compared to the natural counterparts.
Cleverly put.
You've discussed this in the past but suddenly has me thinking about grapefruit juice. Surely you're aware that grapefruit juice can increase the "potency" (absorbability?) of various pharmals, yet also can have the opposite effect on others.
Would you happen to know whether this might also be the case if one drinks grapefruit juice with particular herbs, minerals, vitamins, etc.?